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tty_operations::set_termios is optional. If it doesn't exist, nothing is called. So remove almost¹ empty set_termios implementations. ¹ capi had an useless pr_debug in it. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Karsten Keil <isdn@linux-pingi.de> Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com> Link: https://lore.kernel.org/r/20210505091928.22010-32-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>